$totalDuration=$gfe->getTotalDuration(); // Total duration of the animated GIF$frameNumber=$gfe->getFrameNumber(); // Number of extracted framesvar_dump($gfe->getFrameDimensions()); // An array containing the dimension of each extracted framevar_dump($gfe->getFramePositions()); // An array containing the original positions of each extracted frame inside the GIF

Option:

You can choose if you want to get the original frames (with transparency background) or frames pasted on the first one
with the second parameter of extract() method: